UPSC IFS 2026 Syllabus PDF - Download Latest UPSC IFS Syllabus for All Subjects

Updated By Pratha Shishodia on 07 Jan, 2026 15:40

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UPSC IFS 2026 Syllabus

The UPSC IFS 2026 Syllabus was laid down by the Union Public Service Commission (UPSC) in detail for the IFS exam for the candidates. The UPSC IFS 2026 syllabus is different for both Preliminary and main exams. Candidates willing to be recruited in Forestry Services should have a good understanding of the syllabus of UPSC IFS 2026. If candidates are aware of the syllabus, then the preparation for the examination becomes easy and smooth. The syllabus helps in understanding the portions of the subjects that will combine to form the question paper of the UPSC IFS examination. 

Also Check: UPSC IAF Result 2026

Upcoming Exams :

UPSC IFS Preliminary Exam Syllabus 2026

Students can check out the UPSC IFS syllabus 2026 for Preliminary exam in the table given below.

General Studies

  1. Current Affairs: Events of national and international importance.
  2. Geography of India and World: Physical, Economic, and Social Geography of India and the World.
  3. History: India History and Indian National Movement.
  4. Economic and Social Development: Social Sector Initiatives, Inclusion, Sustainable Development, Poverty, Demographics, etc.
  5. Indian Polity and Governance: Constitution of India, Political System, Panchayati Raj, Rights Issues, Public Policy, etc.
  6. Environment and Science: General issues on Environmental ecology, Climate Change, and Biodiversity.
  • General Science

CSAT

  1. Reading Comprehension: English, Interpersonal skills including communication skills
  2. Reasoning: Logical reasoning and analytical ability, decision-making, and problem-solving.
  3. General Mental Ability: Class X level topics on basic numeracy (numbers and their relations, orders of magnitude, etc.)
  4. Data Interpretation: Class X level charts, tables, graphs, data sufficiency, etc.

Also Read: UPSC IFS Previous Year Question Paper

UPSC IFS Mains Exam Syllabus 2026

After passing the UPSC IFS Prelims, candidates should go through the details of the UPSC IFS 2026 Mains Exam Syllabus. The UPSC IFS 2026 Mains exam will have a six-question paper covering the topics listed below:

UPSC IFS 2026 Syllabus for Compulsory Subjects

ubjectTopics
General English
  • An Essay in English
  • Questions designed to test candidates’ understanding of English and usage of words.
  • Passages will usually be set for summary.
General Knowledge
  • General Knowledge including knowledge of current events 
  • The paper will also include questions on the following subjects:
    • Indian Polity including the political system
    • Constitution of India
    • History of India
    • Geography

UPSC IFS 2026 Syllabus for Optional Subject 

ubject

Topics

Agriculture

Paper I:

  • Ecology
  • Cropping patterns and related topics
  • Forestry plantations
  • Soil
  • Farm management
  • Agricultural extension, etc.

Paper II:

  • Cell Theory
  • Cytoplasmic inheritance
  • Seed technology
  • Physiology
  • Growth and development
  • Pests and diseases
  • Food production

Animal Husbandry & Veterinary Science

Paper I:

  • Animal Nutrition
  • Animal Physiology
  • Livestock Production and Management
  • Genetics and Animal Breeding

Paper II:

  • Health and Hygiene
  • Veterinary Public Health
  • Animal Diseases
  • Milk and Milk Products Technology
  • Meat Hygiene and Technology
  • Extension

Chemistry

Paper I:

  • Atomic structure
  • Chemical bonding
  • Solid State
  • The gaseous state
  • Thermodynamics and statistical thermodynamics
  • Phase equilibria and solutions
  • Electrochemistry
  • Chemical kinetics
  • Photochemistry
  • Surface phenomena and catalysis
  • Bio-inorganic chemistry
  • Coordination chemistry
  • General chemistry of ‘f’ block elements
  • Non-Aqueous Solvents

Paper II:

  • Delocalised covalent bonding
  • Pericyclic reactions
  • Reactions
  • Chemistry and mechanism of reactions
  • Polymeric Systems
  • Synthetic uses of reagents
  • Photochemistry
  • Principles of spectroscopy and applications in structure elucidation

Agricultural Engineering

Paper I:

  • Soil and Water Conservation
  • Aerial Photography and Remote Sensing
  • Irrigation and Drainage
  • Agricultural Structures

Paper II:

  • Farm Power and Machinery
  • Agro-energy
  • Agricultural Process Engineering
  • Instrumentation and Computer Applications in Agricultural Engineering

Statistics

Paper I:

  • Probability
  • Statistical Inference
  • Linear Inference and Multivariate Analysis
  • Sampling Theory and Design of Experiments

Paper II:

  • Industrial Statistics
  • Optimization Techniques
  • Quantitative Economics and Official Statistics
  • Demography and Psychometry

Botany

Paper I:

  • Microbiology and Plant Pathology
  • Cryptogams
  • Phanerogams
  • Plant Utility and Exploitation
  • Morphogenesis

Paper II:

  • Cell Biology
  • Genetics, Molecular Biology and Evolution
  • Plant Breeding, Biotechnology and Biostatistics
  • Physiology and Biochemistry
  • Ecology and Plant Geography

Civil Engineering

Paper I:

  • Strength of materials
  • Structural analysis
  • Engineering Mechanics
  • Structural Steel Design
  • Design of Concrete and Masonry Structures
  • Fluid Mechanics, Open channel flow, and Hydraulic Mechanics
  • Hydraulic Machine and Hydropower
  • Geotechnical engineering

Paper II:

  • Construction Technology
  • Construction Equipment
  • Survey and Transport Engineering
  • Hydrology, Water Resources, and Engineering
  • Environmental Engineering

Chemical Engineering

Paper I:

  • Fluid and Particle Dynamics
  • Mass Transfer
  • Heat Transfer
  • Noval Separation Processes
  • Process Equipment Design
  • Process Dynamics and Control

Paper II:

  • Material and Energy Balances
  • Chemical Engineering Thermodynamics
  • Chemical Reaction Engineering
  • Chemical Technology
  • Environmental Engineering and Safety
  • Process Engineering Economics

Mathematics

Paper I:

  • Linear Algebra
  • Calculus
  • Analytic Geometry
  • Dynamics, Statics, and Hydrostatics
  • Vector Analysis
  • Ordinary Differential Equations

Paper II:

  • Algebra
  • Real Analysis
  • Complex Analysis
  • Linear Programming
  • Partial differential equations
  • Numerical Analysis and Computer programming
  • Numerical integration
  • Numerical solution of ordinary differential equations
  • Computer Programming
  • Mechanics and Fluid Dynamics

Mechanical Engineering

Paper I:

  • Theory of Machines
  • Mechanics of Solids
  • Engineering Materials
  • Manufacturing Science
  • Manufacturing Management
  • Elements of Computation

Paper II:

  • Thermodynamics
  • I.C. Engines, Fuels and Combustion
  • Heat Transfer, Refrigeration and Air Conditioning
  • Turbomachine and Powerplants

Physics

Paper I:

  • Classical Mechanics
  • Special Relativity, Waves & Geometrical Optics
  • Physical Optics
  • Electricity and Magnetism
  • Electromagnetic Theory & Black Body Radiation
  • Thermal and Statistical Physics

Paper II:

  • Quantum Mechanics I
  • Quantum Mechanics II & Atomic Physics
  • Molecular Physics
  • Nuclear Physics
  • Particle Physics & Solid State Physics
  • Electronics

Forestry

Paper I:

  • Silviculture
  • Agroforestry, Social Forestry, Joint Forest Management and Tribology
  • Forest Soils, Soil Conservation and Watershed management
  • Environmental Conservation and Biodiversity
  • Tree Improvement and Seed Technology

Paper II:

  • Forest Management and Management Systems
  • Forest Working Plan
  • Forest Mensuration and Remote
  • Sensing
  • Surveying and Forest Engineering
  • Forest Resources and Utilization
  • Forest Ecology and Ethnobotany
  • Forest Protection & Wildlife Biology
  • Forest Economics and Legislation

Geology

Paper I:

  • General Geology
  • Geomorphology and Remote Sensing
  • Structural Geology
  • Paleontology
  • Stratigraphy and Geology of India
  • Hydrogeology and Engineering Geology

Paper II:

  • Mineralogy
  • Igneous and Metamorphic Petrology
  • Sedimentology
  • Economic Geology
  • Mining Geology
  • Geochemistry and Environmental Geology

Also Read

UPSC IFS Answer Key 2026

UPSC IFS Mock Test 2026

Best Books for UPSC IFS 2026

UPSC IFS Coaching Institutes

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